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Inflorescence 1- or 2-flowered |
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(2) |
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Inflorescence usually more than 2-flowered, often in cymes, glomerules, or panicles |
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(4) |
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| 2 (1) |
Flowers leaf-opposed, ca. 1.2 cm in diam.; outer petals rounded, ca. 6 mm; inner petals ca. 4 mm. |
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1 F. cupreonitens |
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Flowers axillary or subaxillary, 3-4 cm in diam.; outer petals ovate-triangular or oblong, 14-24 mm; inner petals 10-14 mm |
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(3) |
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| 3 (2) |
Leaf blade oblong; pedicel ca. 2 cm; stigmas apically entire; ripe carpels 4-5 × ca. 4 cm. |
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2 F. uonicum |
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Leaf blade lanceolate to elliptic-lanceolate; pedicel ca. 0.5 cm; stigmas apically 2-cleft; ripe carpels ca. 1.8 × 1.5 cm. |
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3 F. maclurei |
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| 4 (1) |
Leaf blade abaxially glabrous or obscurely sparsely pubescent, glabrescent |
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(5) |
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Leaf blade abaxially densely tomentose, densely pubescent, or hispid |
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(9) |
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| 5 (4) |
Leaf blade abaxially grayish white or grayish green and glaucous when dry |
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(6) |
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Leaf blade greenish or abaxially grayish green and not glaucous |
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(7) |
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| 6 (5) |
Leaf blade 1.2-6 cm wide; inflorescences thyrses; petals 5-6 mm; ovaries 1-ovuled; stigmas apically 2-cleft. |
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4 F. glaucescens |
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Leaf blade 6-8 cm wide; inflorescences cymes; petals ca. 15 mm; ovaries ca. 30-ovuled; stigmas apically entire. |
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5 F. pallens |
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| 7 (5) |
Leaf blade base truncate to slightly cordate, secondary veins 18-20 on each side of midvein; stigmas apically entire; ripe monocarps 3.5-4 cm wide; ovules ca. 10 per carpel. |
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6 F. chloroneurum |
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Leaf blade base rounded, obtuse, or broadly cuneate, secondary veins 13-15 on each side of midvein; stigmas apically 2-cleft; ripe monocarps 2-3 cm wide; ovules 4 or ca. 22 per carpel |
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(8) |
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| 8 (7) |
Young branchlets ferruginous pubescent; cymes usually leaf-opposed or alternate; ovules 4 per carpel; ripe monocarps glabrescent. |
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7 F. wallichii |
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Branchlets glabrous; panicles terminal or axillary; ovules ca. 22 per carpel; ripe monocarps densely fulvous tomentulose. |
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8 F. tonkinense |
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| 9 (4) |
Flowers in panicles or cymes |
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(10) |
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Flowers in glomerules |
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(16) |
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| 10 (9) |
Inflorescence rachides 1-28 cm |
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(11) |
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Inflorescence rachides 0.1-0.5 cm |
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(13) |
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| 11 (10) |
Leaf blade apex acute; flower buds ovoid; petals ovate; stamen connectives ovoid, apex obtuse. |
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9 F. latifolium |
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Leaf blade apex rounded or retuse; flower buds conic or lanceolate; petals oblong-lanceolate or ovate-elliptic; stamen connectives conic or broadly ovoid, apex acuminate or truncate |
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(12) |
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| 12 (11) |
Peduncle to 28 cm; pedicel 2-3 mm; petals ovate-elliptic to ovate-oblong; stamen connectives apically acuminate; stigma apex 2-cleft. |
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10 F. tungfangense |
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Peduncle ca. 1 cm; pedicel ca. 15 mm; petals oblong-lanceolate to narrowly lanceolate; stamen connectives apically truncate; stigma apex entire. |
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11 F. tientangense |
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| 13 (10) |
Leaf blade secondary veins adaxially flattened; stigma apex 2-cleft |
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(14) |
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Leaf blade secondary veins adaxially concave; stigma apex entire |
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(15) |
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| 14 (13) |
Sepals connate at base, broadly triangular, ca. 3 × 3.5 mm; stamen connectives broadly triangular. |
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12 F. polyanthoides |
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Sepals free at base, ovate-triangular, ca. 2 × 2 mm; stamen connectives obliquely triangular. |
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13 F. poilanei |
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| 15 (13) |
Leaf blade base cuneate to broadly cuneate; inner petals pubescent outside; ripe monocarps ca. 1.2 cm in diam. |
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14 F. acuminatissimum |
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Leaf blade base shallowly cordate; inner petals glabrous outside; ripe monocarps 2-2.5 cm in diam. |
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15 F. cavaleriei |
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| 16 (9) |
Leaf blade secondary veins 25-35 on each side of midvein; ripe monocarps ca. 4 cm in diam. |
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16 F. balansae |
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Leaf blade secondary veins 13-20 on each side of midvein; ripe monocarps 1.5-3 cm in diam |
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(17) |
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| 17 (16) |
Leaf blade secondary veins adaxially flattened |
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(18) |
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Leaf blade secondary veins adaxially concave |
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(20) |
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| 18 (17) |
Branches and abaxial leaf blade surfaces densely tomentose; outer petals with a prominent abaxial midrib; stamen connectives subrounded or truncate. |
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17 F. xylopetalum |
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Branches and abaxial leaf blade surfaces pubescent to glabrescent; outer petals without a prominent midrib; stamen connectives triangular or slightly obliquely triangular |
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(19) |
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| 19 (18) |
Petals 2-2.1 cm; ovules 10 per carpel; stigmas apically 2-cleft. |
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18 F. oldhamii |
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Petals 0.9-1.2 cm; ovules 4-6 per carpel; stigmas apically entire. |
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19 F. polyanthum |
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| 20 (17) |
Bracteoles many, longer than or as long as sepals; stigmas apically 2-cleft. |
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20 F. bracteolatum |
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Bracteoles few or absent, if present shorter than sepals; stigmas apically entire |
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(21) |
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| 21 (20) |
Leaf blade oblong-lanceolate to narrowly oblong, apex slightly acute; stamen connectives long lanceolate. |
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21 F. kwangsiense |
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Leaf blade broadly ovate, obovate, or obovate-oblong, apex rounded or retuse; stamen connectives broadly or obliquely triangular |
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(22) |
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| 22 (21) |
Leaf blade base rounded, truncate, or shallowly cordate; inflorescences leaf-opposed; sepals ovate-lanceolate, ca. 1 cm; outer petals ovate- oblong, ca. 1.5 cm; ovules 4 per carpel; ripe monocarps globose. |
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22 F. retusum |
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Leaf blade base broadly cuneate or rounded; inflorescences extra- axillary; sepals broadly triangular, ca. 5 mm; outer petals ovate, ca. 1 cm; ovules 10 per carpel; ripe monocarps oblong. |
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23 F. shangtzeense |
